I am working in a pump company research and development. I work in CFX.

while doing CFD, I am facing problem that how do we really observe the flow at shut off through CFD. ??

what are the necessary steps that I should follow to calculate flow?

currently i am working for the new pump development, where I have to plot performance curve of the pump, I have observed flow at duty point, 80% and 120% of the duty point, but that gives only 3 reading ,
I want to observe the flow at shut off.